Celebrating the 50th anniversary of turning regular BMWs into classy performance machines, Alpina announced the launch of 50 super special saloon, estate, and coupe models based on the Alpina B5 Bi-Turbo and the B6 Bi-Turbo. These cars come with special trims and a “heavily revised V8” engine.

The heavily revised V8 pumps out 600 horsepower and 800 Nm (590 lb-ft) of torque, which makes the Edition 50 models the most powerful production Alpina series ever. It makes possible a 0 to 100 km/h sprint time of 4.2 seconds and a top speed of 204 mph, which is lot more than what you get from the electronically governed M5 and M6.

The engine powering the Alpina B5 and B6 models are the same 4.4 liter V8 you find in the standard versions, but here it is fitted with two ALPINA-specific turbochargers located between the cylinder banks, large-capacity oil radiator and supplementary coolant radiator, and lightweight pistons, among other changes. It also features a light-weight titanium exhaust system made by Akrapovic.

Other highlights of the Alpina B5 and B6 Edition 50 models include lightweight wheels, limited slip differential, new front spoiler, hand-crafted sports seats in black leather with luxurious Forest Green quilting, Alpina Blue instruments, bespoke steering wheel, and a limited edition plaque with the car’s number on it.